Any idea what could cause these slow down/disconnects?

 

Top 10 by Last Error
  1 Site kaz-group.com (216.82.241.99) said after data sent: 399 TCP Read failed (Err Code Zero after 0 seconds) 0 sec
  1 Site (aol.com/205.188.103.1) said: 399 TCP Read failed (An existing connection was forcibly closed by the remote host. after 42 seconds) 42 sec
  1 HELO response (399 TCP Read failed (An existing connection was forcibly closed by the remote host. after 19 seconds) 19 sec)
  1 open (192.231.203.138) 21s failed A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond. 21 sec
  1 Site (internode.on.net/192.231.203.138) said: 399 TCP Read failed (An existing connection was forcibly closed by the remote host. after 28 seconds) 28 sec
  1 Site originenergy.com.au (203.20.195.34) said after data sent: 399 TCP Read failed (An existing connection was forcibly closed by the remote host. after 51 seconds) 51 sec

 

 

Everything seems to be fine if I run speed/ping tests etc on my net connection....

T.